Upper back pain can occur due to age, lack of physical activity, obesity, psychological stress, underlying medical conditions like arthritis, or smoking. Some common symptoms include radiating pain, burning sensation, tenderness, stiffness, and tightness. Diagnosis may involve blood tests, imaging like x-rays or MRI, or nerve tests. Treatment options recommended by doctors include painkillers, physical therapy, or surgery. Maintaining good posture, taking breaks, and light exercise can help prevent upper back pain.